Syllabus - Watershed Hydrology (AN304)

Agriculture Engineering

Watershed Hydrology (AN304)

III-Semester

Unit I

Hydrologic cycle, precipitation and its forms, rainfall measurement and estimation of mean rainfall, frequency analysis of point rainfall.

Mass curve, hyetograph, depth-area-duration curves and intensity-duration-frequency relationship. Hydrologic processes-interception, infiltration - factors influencing, measurement and indices.

Unit II

Evaporation - estimation and measurement. Runoff - factors affecting, measurement, stage - discharge rating curve, estimation of peak runoff rate and volume, Rational method, Cook’s method and SCS curve number method. Geomorphology of watersheds – Linear, aerial and relief aspects of watersheds- stream order, drainage density and stream frequency. Hydrograph - components, base flow separation, unit hydrograph theory, S-curve, synthetic hydrograph, applications and limitations.

Unit III

Floods – terms and definitions head water flood control- method. Stream gauging - discharge rating curves, flood peak, design flood and computation of probable flood.

Unit IV

Flood routing – channel and reservoir routing. Drought – classification causes and impacts, drought management strategy.

Course Objective

To familiarize the students with the important aspects of watershed hydrology and to impart the knowledge about the various hydrologic phenomena and their relevance in the field of soil and water conservation.

Course Outcome

Students understand important aspects of watershed hydrology and the relevance of different hydrologic phenomena in the field of soil engineering.

Practicals

  • Visit to meteorological observatory and study of different instruments

  • Design of rain gauge network

  • Exercise on intensity - frequency - duration curves

  • Exercise on depth - area - duration and double mass curves

  • Analysis of rainfall data and estimation of mean rainfall by different methods

  • Exercise on frequency analysis of hydrologic data and estimation of missing data, test for consistency of rainfall records.

  • Exercise on computation of infiltration indices

  • Computation of peak runoff and runoff volume by Cook’s method and rational formula

  • Computation of runoff volume by SCS curve number method

  • Study of stream gauging instruments - current meter and stage level recorder

  • Exercise on geomorphic parameters of watersheds

  • Exercise on runoff hydrograph

  • Exercise on synthetic hydrograph

  • Exercise on flood routing

Reference Books

  • Chow, V.T., D.R. Maidment and L.W. Mays. 2010. Applied Hydrology, McGraw Hill Publishing Co., New York.

  • Jaya Rami Reddy, P. 2011.A Text Book of Hydrology. University Science Press, New Delhi.

  • Linsley, R.K., M.A. Kohler, and J.L.H. Paulhus. 1984. Hydrology for Engineers. McGraw-Hill Publishing Co., Japan.

  • Mutreja, K.N. 1990. Applied Hydrology. Tata McGraw-Hill Publishing Co., New Delhi.

  • Raghunath, H.M. 2006. Hydrology: Principles Analysis and Design. Revised 2nd Edition, New Age International (P) Limited Publishers, New Delhi.

  • Subramanya, K. 2008. Engineering Hydrology.3rd Edition, Tata McGraw-Hill Publishing Co., New Delhi.

  • Suresh, R. 2005. Watershed Hydrology. Standard Publishers Distributors, Delhi. Varshney, R.S. 1986. Engineering Hydrology. Nem Chand and Brothers, Roorkee, U.P.